diff options
Diffstat (limited to 'plugins/LdapAuthentication')
| -rw-r--r-- | plugins/LdapAuthentication/LdapAuthenticationPlugin.php | 331 | ||||
| -rw-r--r-- | plugins/LdapAuthentication/README | 82 |
2 files changed, 413 insertions, 0 deletions
diff --git a/plugins/LdapAuthentication/LdapAuthenticationPlugin.php b/plugins/LdapAuthentication/LdapAuthenticationPlugin.php new file mode 100644 index 000000000..8caacff46 --- /dev/null +++ b/plugins/LdapAuthentication/LdapAuthenticationPlugin.php @@ -0,0 +1,331 @@ +<?php +/** + * StatusNet, the distributed open-source microblogging tool + * + * Plugin to enable LDAP Authentication + * + * PHP version 5 + * + * LICENCE: This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * @category Plugin + * @package StatusNet + * @author Craig Andrews <candrews@integralblue.com> + * @copyright 2009 Craig Andrews http://candrews.integralblue.com + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 + * @link http://status.net/ + */ + +if (!defined('STATUSNET') && !defined('LACONICA')) { + exit(1); +} + +require_once INSTALLDIR.'/plugins/Authentication/AuthenticationPlugin.php'; +require_once 'Net/LDAP2.php'; + +class LdapAuthenticationPlugin extends AuthenticationPlugin +{ + public $host=null; + public $port=null; + public $version=null; + public $starttls=null; + public $binddn=null; + public $bindpw=null; + public $basedn=null; + public $options=null; + public $filter=null; + public $scope=null; + public $password_encoding=null; + public $attributes=array(); + + function onInitializePlugin(){ + parent::onInitializePlugin(); + if(!isset($this->host)){ + throw new Exception("must specify a host"); + } + if(!isset($this->basedn)){ + throw new Exception("must specify a basedn"); + } + if(!isset($this->attributes['nickname'])){ + throw new Exception("must specify a nickname attribute"); + } + if(!isset($this->attributes['username'])){ + throw new Exception("must specify a username attribute"); + } + if($this->password_changeable && (! isset($this->attributes['password']) || !isset($this->password_encoding))){ + throw new Exception("if password_changeable is set, the password attribute and password_encoding must also be specified"); + } + } + + //---interface implementation---// + + function checkPassword($username, $password) + { + $entry = $this->ldap_get_user($username); + if(!$entry){ + return false; + }else{ + $config = $this->ldap_get_config(); + $config['binddn']=$entry->dn(); + $config['bindpw']=$password; + if($this->ldap_get_connection($config)){ + return true; + }else{ + return false; + } + } + } + + function autoRegister($username) + { + $entry = $this->ldap_get_user($username,$this->attributes); + if($entry){ + $registration_data = array(); + foreach($this->attributes as $sn_attribute=>$ldap_attribute){ + $registration_data[$sn_attribute]=$entry->getValue($ldap_attribute,'single'); + } + if(isset($registration_data['email']) && !empty($registration_data['email'])){ + $registration_data['email_confirmed']=true; + } + //set the database saved password to a random string. + $registration_data['password']=common_good_rand(16); + return User::register($registration_data); + }else{ + //user isn't in ldap, so we cannot register him + return false; + } + } + + function changePassword($username,$oldpassword,$newpassword) + { + if(! isset($this->attributes['password']) || !isset($this->password_encoding)){ + //throw new Exception(_('Sorry, changing LDAP passwords is not supported at this time')); + return false; + } + $entry = $this->ldap_get_user($username); + if(!$entry){ + return false; + }else{ + $config = $this->ldap_get_config(); + $config['binddn']=$entry->dn(); + $config['bindpw']=$oldpassword; + if($ldap = $this->ldap_get_connection($config)){ + $entry = $this->ldap_get_user($username,array(),$ldap); + + $newCryptedPassword = $this->hashPassword($newpassword, $this->password_encoding); + if ($newCryptedPassword===false) { + return false; + } + if($this->password_encoding=='ad') { + //TODO I believe this code will work once this bug is fixed: http://pear.php.net/bugs/bug.php?id=16796 + $oldCryptedPassword = $this->hashPassword($oldpassword, $this->password_encoding); + $entry->delete( array($this->attributes['password'] => $oldCryptedPassword )); + } + $entry->replace( array($this->attributes['password'] => $newCryptedPassword ), true); + if( Net_LDAP2::isError($entry->upate()) ) { + return false; + } + return true; + }else{ + return false; + } + } + + return false; + } + + //---utility functions---// + function ldap_get_config(){ + $config = array(); + $keys = array('host','port','version','starttls','binddn','bindpw','basedn','options','filter','scope'); + foreach($keys as $key){ + $value = $this->$key; + if($value!==null){ + $config[$key]=$value; + } + } + return $config; + } + + function ldap_get_connection($config = null){ + if($config == null && isset($this->default_ldap)){ + return $this->default_ldap; + } + + //cannot use Net_LDAP2::connect() as StatusNet uses + //PEAR::setErrorHandling(PEAR_ERROR_CALLBACK, 'handleError'); + //PEAR handling can be overridden on instance objects, so we do that. + $ldap = new Net_LDAP2(isset($config)?$config:$this->ldap_get_config()); + $ldap->setErrorHandling(PEAR_ERROR_RETURN); + $err=$ldap->bind(); + if (Net_LDAP2::isError($err)) { + common_log(LOG_WARNING, 'Could not connect to LDAP server: '.$err->getMessage()); + return false; + } + if($config == null) $this->default_ldap=$ldap; + return $ldap; + } + + /** + * get an LDAP entry for a user with a given username + * + * @param string $username + * $param array $attributes LDAP attributes to retrieve + * @return string DN + */ + function ldap_get_user($username,$attributes=array(),$ldap=null){ + if($ldap==null) { + $ldap = $this->ldap_get_connection(); + } + $filter = Net_LDAP2_Filter::create($this->attributes['username'], 'equals', $username); + $options = array( + 'attributes' => $attributes + ); + $search = $ldap->search(null,$filter,$options); + + if (PEAR::isError($search)) { + common_log(LOG_WARNING, 'Error while getting DN for user: '.$search->getMessage()); + return false; + } + + if($search->count()==0){ + return false; + }else if($search->count()==1){ + $entry = $search->shiftEntry(); + return $entry; + }else{ + common_log(LOG_WARNING, 'Found ' . $search->count() . ' ldap user with the username: ' . $username); + return false; + } + } + + /** + * Code originaly from the phpLDAPadmin development team + * http://phpldapadmin.sourceforge.net/ + * + * Hashes a password and returns the hash based on the specified enc_type. + * + * @param string $passwordClear The password to hash in clear text. + * @param string $encodageType Standard LDAP encryption type which must be one of + * crypt, ext_des, md5crypt, blowfish, md5, sha, smd5, ssha, or clear. + * @return string The hashed password. + * + */ + + function hashPassword( $passwordClear, $encodageType ) + { + $encodageType = strtolower( $encodageType ); + switch( $encodageType ) { + case 'crypt': + $cryptedPassword = '{CRYPT}' . crypt($passwordClear,$this->randomSalt(2)); + break; + + case 'ext_des': + // extended des crypt. see OpenBSD crypt man page. + if ( ! defined( 'CRYPT_EXT_DES' ) || CRYPT_EXT_DES == 0 ) {return FALSE;} //Your system crypt library does not support extended DES encryption. + $cryptedPassword = '{CRYPT}' . crypt( $passwordClear, '_' . $this->randomSalt(8) ); + break; + + case 'md5crypt': + if( ! defined( 'CRYPT_MD5' ) || CRYPT_MD5 == 0 ) {return FALSE;} //Your system crypt library does not support md5crypt encryption. + $cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$1$' . $this->randomSalt(9) ); + break; + + case 'blowfish': + if( ! defined( 'CRYPT_BLOWFISH' ) || CRYPT_BLOWFISH == 0 ) {return FALSE;} //Your system crypt library does not support blowfish encryption. + $cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$2a$12$' . $this->randomSalt(13) ); // hardcoded to second blowfish version and set number of rounds + break; + + case 'md5': + $cryptedPassword = '{MD5}' . base64_encode( pack( 'H*' , md5( $passwordClear) ) ); + break; + + case 'sha': + if( function_exists('sha1') ) { + // use php 4.3.0+ sha1 function, if it is available. + $cryptedPassword = '{SHA}' . base64_encode( pack( 'H*' , sha1( $passwordClear) ) ); + } elseif( function_exists( 'mhash' ) ) { + $cryptedPassword = '{SHA}' . base64_encode( mhash( MHASH_SHA1, $passwordClear) ); + } else { + return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes. + } + break; + + case 'ssha': + if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) { + mt_srand( (double) microtime() * 1000000 ); + $salt = mhash_keygen_s2k( MHASH_SHA1, $passwordClear, substr( pack( "h*", md5( mt_rand() ) ), 0, 8 ), 4 ); + $cryptedPassword = "{SSHA}".base64_encode( mhash( MHASH_SHA1, $passwordClear.$salt ).$salt ); + } else { + return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes. + } + break; + + case 'smd5': + if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) { + mt_srand( (double) microtime() * 1000000 ); + $salt = mhash_keygen_s2k( MHASH_MD5, $passwordClear, substr( pack( "h*", md5( mt_rand() ) ), 0, 8 ), 4 ); + $cryptedPassword = "{SMD5}".base64_encode( mhash( MHASH_MD5, $passwordClear.$salt ).$salt ); + } else { + return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes. + } + break; + + case 'ad': + $cryptedPassword = ''; + $passwordClear = "\"" . $passwordClear . "\""; + $len = strlen($passwordClear); + for ($i = 0; $i < $len; $i++) { + $cryptedPassword .= "{$passwordClear{$i}}\000"; + } + + case 'clear': + default: + $cryptedPassword = $passwordClear; + } + + return $cryptedPassword; + } + + /** + * Code originaly from the phpLDAPadmin development team + * http://phpldapadmin.sourceforge.net/ + * + * Used to generate a random salt for crypt-style passwords. Salt strings are used + * to make pre-built hash cracking dictionaries difficult to use as the hash algorithm uses + * not only the user's password but also a randomly generated string. The string is + * stored as the first N characters of the hash for reference of hashing algorithms later. + * + * --- added 20021125 by bayu irawan <bayuir@divnet.telkom.co.id> --- + * --- ammended 20030625 by S C Rigler <srigler@houston.rr.com> --- + * + * @param int $length The length of the salt string to generate. + * @return string The generated salt string. + */ + + function randomSalt( $length ) + { + $possible = '0123456789'. + 'abcdefghijklmnopqrstuvwxyz'. + 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'. + './'; + $str = ""; + mt_srand((double)microtime() * 1000000); + + while( strlen( $str ) < $length ) + $str .= substr( $possible, ( rand() % strlen( $possible ) ), 1 ); + + return $str; + } +} diff --git a/plugins/LdapAuthentication/README b/plugins/LdapAuthentication/README new file mode 100644 index 000000000..2226159c2 --- /dev/null +++ b/plugins/LdapAuthentication/README @@ -0,0 +1,82 @@ +The LDAP Authentication plugin allows for StatusNet to handle authentication +through LDAP. + +Installation +============ +add "addPlugin('ldapAuthentication', + array('setting'=>'value', 'setting2'=>'value2', ...);" +to the bottom of your config.php + +Settings +======== +provider_name*: a unique name for this authentication provider. +authoritative (false): Set to true if LDAP's responses are authoritative + (if authorative and LDAP fails, no other password checking will be done). +autoregistration (false): Set to true if users should be automatically created + when they attempt to login. +email_changeable (true): Are users allowed to change their email address? + (true or false) +password_changeable (true): Are users allowed to change their passwords? + (true or false) +password_encoding: required if users are to be able to change their passwords + Possible values are: crypt, ext_des, md5crypt, blowfish, md5, sha, ssha, + smd5, ad, clear + +host*: LDAP server name to connect to. You can provide several hosts in an + array in which case the hosts are tried from left to right. + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +port: Port on the server. + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +version: LDAP version. + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +starttls: TLS is started after connecting. + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +binddn: The distinguished name to bind as (username). + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +bindpw: Password for the binddn. + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +basedn*: LDAP base name (root directory). + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +options: See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +filter: Default search filter. + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php +scope: Default search scope. + See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php + +attributes: an array that relates StatusNet user attributes to LDAP ones + username*: LDAP attribute value entered when authenticating to StatusNet + nickname*: LDAP attribute value shown as the user's nickname + email + fullname + homepage + location + password: required if users are to be able to change their passwords + +* required +default values are in (parenthesis) + +For most LDAP installations, the "nickname" and "username" attributes should + be the same. + +Example +======= +Here's an example of an LDAP plugin configuration that connects to + Microsoft Active Directory. + +addPlugin('ldapAuthentication', array( + 'provider_name'=>'Example', + 'authoritative'=>true, + 'autoregistration'=>true, + 'binddn'=>'username', + 'bindpw'=>'password', + 'basedn'=>'OU=Users,OU=StatusNet,OU=US,DC=americas,DC=global,DC=loc', + 'host'=>array('server1', 'server2'), + 'password_encoding'=>'ad', + 'attributes'=>array( + 'username'=>'sAMAccountName', + 'nickname'=>'sAMAccountName', + 'email'=>'mail', + 'fullname'=>'displayName', + 'password'=>'unicodePwd') +)); + |